code: def test_apply_to_iterator(self):
      self._check_apply_to_iterator()
  
file_path: chainercv/tests/utils_tests/iterator_tests/test_apply_to_iterator.py
imports: import numpy
  from six.moves import zip_longest
  import unittest
  import chainer
  from chainer.iterators import SerialIterator
  from chainer import testing
  from chainermn import create_communicator
  from chainercv.utils import apply_to_iterator
  from chainercv.utils.testing import attr
label_desc: Use image node_id 3 for calling the TestApplyToIterator obj's underlying member method code with example usage: obj.test_apply_to_iterator() without return types